/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:09:13,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:09:13,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:09:13,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:09:13,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:09:13,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:09:13,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:09:13,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:09:13,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:09:13,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:09:13,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:09:13,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:09:13,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:09:13,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:09:13,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:09:13,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:09:13,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:09:13,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:09:13,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:09:13,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:09:13,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:09:13,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:09:13,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:09:13,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:09:13,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:09:13,500 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:09:13,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:09:13,501 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:09:13,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:09:13,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:09:13,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:09:13,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:09:13,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:09:13,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:09:13,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:09:13,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:09:13,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:09:13,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:09:13,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:09:13,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:09:13,507 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:09:13,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:09:13,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:13,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:09:13,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:09:13,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:09:13,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:09:13,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:09:13,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:09:13,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:09:13,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:09:13,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:09:13,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:09:13,798 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:09:13,798 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:09:13,799 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-11-06 19:09:13,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ac1cf6c/a933ebe864f940f6a22da93e9a5ea25a/FLAGf5d9d5664 [2019-11-06 19:09:14,512 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:09:14,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-11-06 19:09:14,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ac1cf6c/a933ebe864f940f6a22da93e9a5ea25a/FLAGf5d9d5664 [2019-11-06 19:09:14,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ac1cf6c/a933ebe864f940f6a22da93e9a5ea25a [2019-11-06 19:09:14,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:09:14,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:09:14,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:14,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:09:14,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:09:14,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:14" (1/1) ... [2019-11-06 19:09:14,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687f093b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:14, skipping insertion in model container [2019-11-06 19:09:14,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:14" (1/1) ... [2019-11-06 19:09:14,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:09:14,780 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:09:15,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:15,348 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:09:15,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:15,651 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:09:15,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15 WrapperNode [2019-11-06 19:09:15,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:15,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:09:15,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:09:15,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:09:15,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... [2019-11-06 19:09:15,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:09:15,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:09:15,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:09:15,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:09:15,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:15,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:09:15,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:09:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:09:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:09:15,876 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:09:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:09:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:09:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:09:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:09:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:09:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:17,913 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:17,913 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:17,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:17 BoogieIcfgContainer [2019-11-06 19:09:17,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:17,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:17,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:17,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:17,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:09:14" (1/3) ... [2019-11-06 19:09:17,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bac9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:17, skipping insertion in model container [2019-11-06 19:09:17,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:15" (2/3) ... [2019-11-06 19:09:17,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bac9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:17, skipping insertion in model container [2019-11-06 19:09:17,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:17" (3/3) ... [2019-11-06 19:09:17,924 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label30.c [2019-11-06 19:09:17,934 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:17,943 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:17,953 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:17,998 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:17,999 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:17,999 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:17,999 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:17,999 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:17,999 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:17,999 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:18,000 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 19:09:18,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:18,050 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:18,052 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash 506629546, now seen corresponding path program 1 times [2019-11-06 19:09:18,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:18,068 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145288043] [2019-11-06 19:09:18,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:18,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145288043] [2019-11-06 19:09:18,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:18,463 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:18,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183191645] [2019-11-06 19:09:18,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:18,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:18,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:18,487 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:09:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:21,913 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-11-06 19:09:21,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:21,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-11-06 19:09:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:21,937 INFO L225 Difference]: With dead ends: 1009 [2019-11-06 19:09:21,938 INFO L226 Difference]: Without dead ends: 633 [2019-11-06 19:09:21,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-06 19:09:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-11-06 19:09:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 19:09:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-11-06 19:09:22,104 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 35 [2019-11-06 19:09:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:22,104 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-11-06 19:09:22,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-11-06 19:09:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 19:09:22,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:22,112 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:22,112 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -295507094, now seen corresponding path program 1 times [2019-11-06 19:09:22,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:22,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170471877] [2019-11-06 19:09:22,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:22,388 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170471877] [2019-11-06 19:09:22,389 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:22,389 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:09:22,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378388922] [2019-11-06 19:09:22,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:09:22,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:09:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:22,392 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-11-06 19:09:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:25,406 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-11-06 19:09:25,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:09:25,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-11-06 19:09:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:25,424 INFO L225 Difference]: With dead ends: 2436 [2019-11-06 19:09:25,424 INFO L226 Difference]: Without dead ends: 1816 [2019-11-06 19:09:25,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:09:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-11-06 19:09:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-11-06 19:09:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-11-06 19:09:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-11-06 19:09:25,502 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 107 [2019-11-06 19:09:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:25,503 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-11-06 19:09:25,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:09:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-11-06 19:09:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 19:09:25,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:25,507 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:25,507 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash 388493337, now seen corresponding path program 1 times [2019-11-06 19:09:25,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:25,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625084360] [2019-11-06 19:09:25,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:25,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625084360] [2019-11-06 19:09:25,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530346288] [2019-11-06 19:09:25,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:25,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:25,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:25,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:25,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:25,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038941785] [2019-11-06 19:09:25,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:25,890 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:25,892 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-11-06 19:09:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:26,869 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-11-06 19:09:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:26,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-11-06 19:09:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:26,895 INFO L225 Difference]: With dead ends: 4128 [2019-11-06 19:09:26,895 INFO L226 Difference]: Without dead ends: 2357 [2019-11-06 19:09:26,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-11-06 19:09:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-11-06 19:09:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-11-06 19:09:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-11-06 19:09:27,009 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 108 [2019-11-06 19:09:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:27,011 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-11-06 19:09:27,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-11-06 19:09:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 19:09:27,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:27,021 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:27,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:27,227 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:27,228 INFO L82 PathProgramCache]: Analyzing trace with hash -27102898, now seen corresponding path program 1 times [2019-11-06 19:09:27,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:27,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686401362] [2019-11-06 19:09:27,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:27,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686401362] [2019-11-06 19:09:27,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062301148] [2019-11-06 19:09:27,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:27,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:27,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:27,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:27,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:27,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222236573] [2019-11-06 19:09:27,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:27,643 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:27,644 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-11-06 19:09:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:28,727 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-11-06 19:09:28,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:28,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2019-11-06 19:09:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:28,739 INFO L225 Difference]: With dead ends: 4704 [2019-11-06 19:09:28,739 INFO L226 Difference]: Without dead ends: 2361 [2019-11-06 19:09:28,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-11-06 19:09:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-11-06 19:09:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-11-06 19:09:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-11-06 19:09:28,805 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 109 [2019-11-06 19:09:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:28,806 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-11-06 19:09:28,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-11-06 19:09:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 19:09:28,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:28,809 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:29,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:29,013 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:29,014 INFO L82 PathProgramCache]: Analyzing trace with hash 204212222, now seen corresponding path program 1 times [2019-11-06 19:09:29,014 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:29,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695657737] [2019-11-06 19:09:29,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:29,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695657737] [2019-11-06 19:09:29,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:29,247 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:09:29,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948635421] [2019-11-06 19:09:29,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:09:29,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:09:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:29,249 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-11-06 19:09:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:31,843 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-11-06 19:09:31,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:09:31,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2019-11-06 19:09:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:31,870 INFO L225 Difference]: With dead ends: 6927 [2019-11-06 19:09:31,870 INFO L226 Difference]: Without dead ends: 4584 [2019-11-06 19:09:31,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:09:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-11-06 19:09:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-11-06 19:09:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-11-06 19:09:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-11-06 19:09:31,998 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 133 [2019-11-06 19:09:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:31,999 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-11-06 19:09:31,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:09:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-11-06 19:09:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 19:09:32,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:32,003 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:32,004 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1527930193, now seen corresponding path program 1 times [2019-11-06 19:09:32,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:32,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59816424] [2019-11-06 19:09:32,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:32,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59816424] [2019-11-06 19:09:32,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47213510] [2019-11-06 19:09:32,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:09:32,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:32,409 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:32,409 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:09:32,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917035595] [2019-11-06 19:09:32,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:32,410 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:32,411 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-11-06 19:09:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:34,615 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-11-06 19:09:34,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:09:34,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 180 [2019-11-06 19:09:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:34,644 INFO L225 Difference]: With dead ends: 10686 [2019-11-06 19:09:34,645 INFO L226 Difference]: Without dead ends: 6353 [2019-11-06 19:09:34,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:09:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-11-06 19:09:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-11-06 19:09:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-11-06 19:09:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-11-06 19:09:34,807 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 180 [2019-11-06 19:09:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:34,807 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-11-06 19:09:34,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-11-06 19:09:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-06 19:09:34,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:34,815 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:35,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:35,025 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1374428651, now seen corresponding path program 1 times [2019-11-06 19:09:35,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:35,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599094676] [2019-11-06 19:09:35,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:35,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599094676] [2019-11-06 19:09:35,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311858978] [2019-11-06 19:09:35,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 19:09:35,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:35,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:35,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:35,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057263688] [2019-11-06 19:09:35,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:35,525 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:35,526 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-11-06 19:09:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:36,802 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-11-06 19:09:36,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:36,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2019-11-06 19:09:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:36,841 INFO L225 Difference]: With dead ends: 13284 [2019-11-06 19:09:36,841 INFO L226 Difference]: Without dead ends: 7218 [2019-11-06 19:09:36,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-11-06 19:09:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-11-06 19:09:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-11-06 19:09:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-11-06 19:09:36,999 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 198 [2019-11-06 19:09:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:37,000 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-11-06 19:09:37,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-11-06 19:09:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 19:09:37,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:37,006 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:37,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:37,219 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1495700069, now seen corresponding path program 1 times [2019-11-06 19:09:37,219 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:37,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739381680] [2019-11-06 19:09:37,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 66 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:37,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739381680] [2019-11-06 19:09:37,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065428516] [2019-11-06 19:09:37,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:37,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:37,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-06 19:09:38,023 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:38,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-11-06 19:09:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455593766] [2019-11-06 19:09:38,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:38,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:09:38,026 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-11-06 19:09:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:39,600 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-11-06 19:09:39,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:09:39,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-11-06 19:09:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:39,619 INFO L225 Difference]: With dead ends: 12989 [2019-11-06 19:09:39,619 INFO L226 Difference]: Without dead ends: 6533 [2019-11-06 19:09:39,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:09:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-11-06 19:09:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-11-06 19:09:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-11-06 19:09:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-11-06 19:09:39,780 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 202 [2019-11-06 19:09:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:39,780 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-11-06 19:09:39,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-11-06 19:09:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 19:09:39,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:39,786 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:39,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:39,998 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -917252579, now seen corresponding path program 1 times [2019-11-06 19:09:39,999 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:39,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075976322] [2019-11-06 19:09:39,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:40,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075976322] [2019-11-06 19:09:40,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524157408] [2019-11-06 19:09:40,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:40,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:40,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:40,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:09:40,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160022495] [2019-11-06 19:09:40,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:09:40,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:09:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:09:40,514 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-11-06 19:09:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:46,100 INFO L93 Difference]: Finished difference Result 14924 states and 20100 transitions. [2019-11-06 19:09:46,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 19:09:46,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2019-11-06 19:09:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:46,134 INFO L225 Difference]: With dead ends: 14924 [2019-11-06 19:09:46,134 INFO L226 Difference]: Without dead ends: 8430 [2019-11-06 19:09:46,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-11-06 19:09:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2019-11-06 19:09:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8270. [2019-11-06 19:09:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8270 states. [2019-11-06 19:09:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8270 states to 8270 states and 10481 transitions. [2019-11-06 19:09:46,321 INFO L78 Accepts]: Start accepts. Automaton has 8270 states and 10481 transitions. Word has length 237 [2019-11-06 19:09:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:46,321 INFO L462 AbstractCegarLoop]: Abstraction has 8270 states and 10481 transitions. [2019-11-06 19:09:46,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:09:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8270 states and 10481 transitions. [2019-11-06 19:09:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-11-06 19:09:46,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:46,329 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:46,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:46,533 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1023389104, now seen corresponding path program 1 times [2019-11-06 19:09:46,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:46,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297110865] [2019-11-06 19:09:46,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 87 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:47,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297110865] [2019-11-06 19:09:47,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194603111] [2019-11-06 19:09:47,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:47,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 19:09:47,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:47,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:47,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:47,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 57 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:47,646 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:47,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2019-11-06 19:09:47,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612130881] [2019-11-06 19:09:47,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 19:09:47,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 19:09:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:09:47,653 INFO L87 Difference]: Start difference. First operand 8270 states and 10481 transitions. Second operand 19 states. [2019-11-06 19:09:47,863 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46